OSNI Open Data: Digital Terrain Model for Northern Ireland Sheets 151-200

Northern Ireland's Ordnance Survey provides a Digital Terrain Model (DTM) consisting of a grid of regularly spaced points of known height. This download covers 10k sheet numbers 151-200, offering data that can be used to create a 3D image of the land surface. The dataset is published by the Government Digital Service under an Open Government Licence.

Use Cases

• Generate 3D visualizations of the land surface based on the described height grid.
• Conduct terrain analysis for hydrological modeling or flood risk assessment using the DTM.
• Support civil engineering and construction planning with accurate elevation data.
• Create enhanced maps or orthophotographs by integrating the DTM with other spatial data.

Strengths

• Provides a structured grid of regularly spaced height points suitable for 3D modeling.
• Covers a specific, defined geographic area (sheets 151-200) within Northern Ireland.
• Published under an open government licence, facilitating reuse.

Limitations

• Description metadata is limited; actual data resolution, accuracy, and column structure require manual inspection after download.
• Row count and file size are unknown, which may limit suitability assessment for large-scale projects.
• Last update date is unknown; freshness unverified.

Provenance

Source

Ordnance Survey Northern Ireland (OSNI), aggregated via the eu_open_data platform.

Collection Method

Likely derived from aerial or ground survey techniques, processed into a regular grid format.

Time Range

unknown

Freshness

unknown

Geography

Northern Ireland, specifically the area covered by OSNI 10k sheet numbers 151-200.